Home / 438,760.80-658,400.40-320,133.60

Finding the Fourth Proportional to 438,760.80, 658,400.40 and 320,133.60

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Solution

The fourth proportional to 438,760.80, 658,400.40 and 320,133.60 is: 480,389.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,760.80 : 658,400.40 = 320,133.60 : x
  2. Step 2: Convert to fraction form
    438,760.80/658,400.40 = 320,133.60/x
  3. Step 3: Cross multiply
    438,760.80x = 658,400.40 × 320,133.60
  4. Step 4: Simplify right side
    438,760.80x = 210,776,090,293.44
  5. Step 5: Solve for x
    x = 210,776,090,293.44/438,760.80
  6. Step 6: Final answer
    x = 480,389.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.